A bison set evaluation code error

Question

I write a sets evaluation program with flex and bison.

I face a problem with error

bison -d calc.y

flex calc.l

cc -o a.out calc.tab.c lex.yy.c -lfl

calc.y: In function 'yyparse':

calc.y:25: error: request for member 'exp' in something not a structure or union

calc.y:25: error: request for member 'set' in something not a structure or union

calc.y:25: error: request for member 'set' in something not a structure or union

calc.y:26: error: request for member 'exp' in something not a structure or union

calc.y:26: error: request for member 'set' in something not a structure or union

calc.y:26: error: request for member 'set' in something not a structure or union

calc.y:27: error: request for member 'exp' in something not a structure or union

calc.y:27: error: request for member 'set' in something not a structure or union

calc.y:27: error: request for member 'set' in something not a structure or union

calc.y:30: error: request for member 'set' in something not a structure or union

calc.y:30: error: request for member 'string' in something not a structure or union

calc.y:31: error: request for member 'string' in something not a structure or union

calc.y:32: error: request for member 'set' in something not a structure or union

calc.y:32: error: request for member 'set' in something not a structure or union

* Error code 1

my platform information is as follow:

Compiler Version: gcc 4.2.1

Bison: 2.5.1

Flex: 2.5.4

Please help me to deal with above error, thanks very much!

The following links are my codes on Gist.

calc.l：gist.github.com/fbukevin/5662335

calc.y：gist.github.com/fbukevin/5662350

test.h：gist.github.com/fbukevin/5662533

Makefile：gist.github.com/fbukevin/5662359

(I don't have enough reputation to pose more than two link, so I took off "http://")

Answer 1

I found the answer here with different title. Thanks everybody try to help me.

Referenc: Flex/Bison Error:request for member `str' in something not a structure or union